I entered this race a few years back, and found it similar to London in that you cross a large swing bridge across the river. The route was along dual carrigeways, with you passing the leaders as they come the other way. So the route was a bit boring, but the finish was good with a rose, a medal and a pint of lager at the finish. We went by Sports Tours but flew from Birmingham to Shkippol ? Airport, and caught the train under the Airport to Rotterdam. Stayed in a hotel overlooking the finish line. We caught the train home, took the flight and was back in B'ham in time to catch the 6pm train from London. (We gained an hour bst) Imagine the London Marathoners faces when they all had those grotty London Marathon Gongs around their necks, and we showed them our marvelous medals.
I would just like to say that if you do intend to travel, do not go by coach.
We sat at the hotel as the Coaches from the UK arrived, and the peopled looked absolutely shattered.
I hope I've given you an insight as how I saw it anyway.